O. Hultgren et al., Outcome of Staphylococcus aureus-triggered sepsis and arthritis in IL-4-deficient mice depends on the genetic background of the host, EUR J IMMUN, 29(8), 1999, pp. 2400-2405
Disruption of the IL-4 gene in two inbred mouse strains revealed a dual rol
e of IL-4 in Staphylococcus aureus sepsis and arthritis depending on the ho
st's genetic background. IL-4 was protective in 129SV mice, since 5 days af
ter S. aureus inoculation IL-4(-/-) mice displayed 70% mortality as compare
d to survival of all 129SV wild-type counterparts. On the other hand, IL-4
was detrimental in C57BL/6 mice, since survival of IL-4(-/-) C57BL/6 mice w
as increased, as compared to wild-type controls, due to decreased staphyloc
occal growth. Altogether our results show the dual role of IL-4 in S. aureu
s sepsis and arthritis, depending on the genetic background of the host.